7.
1.3. Estimation <ul><li>Activities/task characterized by: </li></ul><ul><li>Effort: how much work will the activity need to be completed </li></ul><ul><li>Resources: how many resources will be working on the activity </li></ul><ul><li>Duration: how long will the activity last for </li></ul><ul><li>… estimation technique provide (at least) two of the quantities specified above </li></ul>1. Definition 2. Gantt Chart MS Project 3. Networks 4. Our Company 5. Scheduling of our Project 6. Reference List

12.
<ul><li>A Gantt chart created using Microsoft Project (MSP). </li></ul><ul><li>Note (1) the critical path is in red, </li></ul><ul><li>(2) the slack is the black lines connected to non-critical activities, </li></ul><ul><li>(3) since Saturday and Sunday are not work days </li></ul><ul><li>and are thus excluded from the schedule, </li></ul><ul><li>some bars on the Gantt chart are longer if they cut through a </li></ul><ul><li>weekend. </li></ul>2. Gantt Chart Example 1. Definition 2. Gantt Chart MS Project 3. Networks 4. Our Company 5. Scheduling of our Project 6. Reference List

20.
3.3. Dummy Activities Dummy Activity: Represents a dependency between tasks which doesn’t represent any activity. 1. Definition 2. Gantt Chart MS Project 3. Networks 4. Our Company 5. Scheduling of our Project 6. Reference List When two paths in an activity network (edges as activities) have a common event but are independent, or partly independent of one another, it is necessary to introduce a dummy activity,

30.
3.9.2. Early Expected Time of an Event <ul><li>Designated as TE </li></ul><ul><li>Calculation of Early Expected Time is part of schedule analysis </li></ul><ul><li>Events which are not on the critical path can be started early </li></ul><ul><ul><li>By definition, events on the critical path cannot be started early </li></ul></ul><ul><ul><li>Can have more than one critical path, on that path events cannot be started early </li></ul></ul><ul><li>Calculated by taking the sum of all task durations on the longest path leading to the event </li></ul><ul><ul><li>Traverse network from left to right </li></ul></ul>1. Definition 2. Gantt Chart MS Project 3. Networks 4. Our Company 5. Scheduling of our Project 6. Reference List

32.
3.9.3. Latest Allowable Time of an Event <ul><li>Designated as TL </li></ul><ul><li>Latest time to which an event can be slipped without affecting succeeding events </li></ul><ul><li>Calculated by taking the sum of all task durations on the longest backward path from the finish date to the event of interest </li></ul><ul><ul><li>Traverse network from right to left </li></ul></ul>1. Definition 2. Gantt Chart MS Project 3. Networks 4. Our Company 5. Scheduling of our Project 6. Reference List

34.
3.9.4. Total Slack <ul><li>Slack is the range of allowable time between when a task can be started, and when it must be started </li></ul><ul><ul><li>Once slack is used up, the finish date of the project is affected </li></ul></ul><ul><ul><li>The task of interest is now on the critical path </li></ul></ul><ul><li>Total slack of an activity is the amount of slack available to all activities on a given subpath of a network </li></ul><ul><li>Total slack of activities on the critical path is zero </li></ul><ul><li>Total Slack of an activity (task) is calculated as follows: </li></ul><ul><li>Total Slack = LS - ES </li></ul>1. Definition 2. Gantt Chart MS Project 3. Networks 4. Our Company 5. Scheduling of our Project 6. Reference List

35.
3.9.5. Free Slack <ul><li>Activities not on the critical path can be delayed without affecting the start time of succeeding tasks </li></ul><ul><li>Free slack of an activity is the amount of time that the activity can slip without affecting its successors </li></ul><ul><ul><li>Assumes that the TE of all preceding tasks has been met </li></ul></ul><ul><li>Free Slack of an activity is calculated as follows: </li></ul><ul><li>Free Slack = ES (earliest successor) - EF </li></ul>1. Definition 2. Gantt Chart MS Project 3. Networks 4. Our Company 5. Scheduling of our Project 6. Reference List

40.
3.11.3. Probability of Finishing by A Target Completion Date <ul><li>Expected duration of project T is the sum of expected Activity times on Critical Path </li></ul><ul><li>Variation in the Project Duration Distribution is the sum of the variations of the activity durations on the Critical Path </li></ul>1. Definition 2. Gantt Chart MS Project 3. Networks 4. Our Company 5. Scheduling of our Project 6. Reference List

43.
3.11.6. Near-Critical Paths <ul><li>PERT is overly Optimistic </li></ul><ul><li>Paths near the Critical Path with Large Variance may become critical </li></ul><ul><li>Probability of Completing All Paths is the Product of Probability on each Path </li></ul>1. Definition 2. Gantt Chart MS Project 3. Networks 4. Our Company 5. Scheduling of our Project 6. Reference List

44.
3.11.7. Meeting the Target Date <ul><li>Actions to Shorten to Project </li></ul><ul><ul><li>Move Activity on the Critical Path to a Parallel Path </li></ul></ul><ul><ul><li>Add or transfer resources from activities with large slack to critical or near-critical activities </li></ul></ul><ul><ul><li>Substitute less time-consuming activities or delete those that are not of utmost importance </li></ul></ul>1. Definition 2. Gantt Chart MS Project 3. Networks 4. Our Company 5. Scheduling of our Project 6. Reference List